The most prominent distinguishing characteristic of elastic cartilage is the presence of ________.

Directing immediate responses to stimuli, usually by coordinating the activities of other organ systems is the function of the ________.

In mucosa-associated lymphoid tissue (MALT), lymphocytes can be aggregated in the epithelia of the ________.

The superior mesenteric and splenic veins unite to form the 

Which of the following statements about the lymphatic system is FALSE?

Blood in an umbilical artery travels from the fetus to the placenta.

Produced by the anterior lobe of the pituitary gland, the hormone called ________ stimulates cell growth and replication  and targets all cells, but especially skeletal muscle and bones.

Chromosomal damage in basal cells or melanocytes can lead to skin cancer.

Following a routine CBC (complete blood count), the hematocrit for Ms. Smith, a 46-year old female, is lower than normal. This would most likely be indicative of what condition?

When the ventricles relax, the __________ valve prevents blood into the left ventricle.